package 集合;

import org.junit.Test;

import java.util.ArrayList;
import java.util.concurrent.ConcurrentHashMap;

/**
 * @author:谢君臣
 * @Date:2021/8/13-20:49
 * @version:1.0
 * @function:
 */
public class Test集合 {

    @Test
    public void test(){
        ArrayList arrayList = new ArrayList();
        ConcurrentHashMap hashMap = new ConcurrentHashMap();
        hashMap.put("zan","sdfafd");
        hashMap.put("zan","sdfafds");
    }
    @Test
    public void test1(){

    }
}
